Furnace construction



Feb, 9, 1932, E. L WATSON 1,344,453

FURNACE CONSTRUCTION Filed Oct. 13, 1930 2 Sheets-Sheet 1 INVENTOR ATTORN EYX Fab. 9, 1932.. WATSON 1,844,453

FURNACE CONSTRUCTION Filed Oct. 15, 1930 2 Sheets-Sheet 2 INVENTORATTORN EY.S

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Fatcnted Feb. 9, 1932 "UNITED S'T'TES EARNEST L. WAT$ON, OF MILAN,MICHIGAN FURNACE CONSTRUCTION Application filed October 13, 1930. SerialNo. 488,476.

This invention relates generally to furnace structures and refers moreparticularly to the construction of and connections between thecombustion chamber and radiator of a hot air furnace.

Una of the essential objects of the invention is to provide a furnacestructure in which the combustion chamber is formed of one material,preferably steel, while the radiator is formed of another material,preferably cast iron.

Another object is to provide a furnace in which the connections betweenthe combus tion chamber and radiator are of special dei sign andcomprise parts having metal-tometal contact, whereby gaskets and allfurnace cement have been dispensed with entirely.

Another object is to provide a furnace structure that may be readilyconverted from one type to another, i. e., frorn a coal furnace to anoil burning furnace.

hither objects, advantages and novel details of construction of thisinvention will be made more apparent as this description proceeds,especially when considered in connection with the accompanying drawings,wherein:

1 Figure 1 is a vertical sectional view through a furnace embodying myinvention;

Figure 2 is a sectional View taken on the line Q;% of Figure 1;

Figure 3 is a sectional view taken on the line 3-3 of Figure t;

Figure 4 is a detail View of one of the nipplea;

Figure 5 is a detail view of the other nippie;

Figure 6 is a View similar to Figure 1 but showing a slightly modifiedconstruction;

Figure 7 is a sectional view taken on the line t'? of Figure 6.

lhtcferring now to the drawings, A is the ash kw pit; F are the grates;C is the combustion chamber; D is the tire brick lining of thecombustion chamber; E is feed chute to the combustion chamber; F is adoor for said chute; G is the radiator,- and H is the outer casing of afurnace embodying my invention.

In the present instance, the upright walls 1 and dome 2 of thecombustion chamber 0 are formed of sheet steel, whereas the radiator Gis cast iron. Preferably the chamber C and radiator G are provided atdiametrically opposite points with aligned tubular portions 3, 4, 5 and6 respectively and are connected by means of nipples? and 8respectively. As shown, the nipple 7 has a rounded outer face fittingWithin the aligned tubular portions 4 and 6 respectively of the radiatorand combustion chamber, while the nipple 8 has two sections 9 and 10threadedly engaging each other and slidably engaging aligned tubularportions 3 and 5 respectively of the radiator and combustion chamber.Preferably the inner faces of the tubular portions 4 and 6 are beveledas shown so as to more readily conform to the rounded outer face of thenipple 7. The sections 9 and 10 of the nipple 8 have shoulders 11 and 12respectively engageable with the ends of the tubular portions 3 and 5.The section 9 is slidable but not rotatable relative to the tubularportion 5 of the radiator, whereas the section 10 is rotatable andslidable Il8.l]l"6 to the tubular portion 8 of the chamber C. Hence whenthe section 10 is rotated relative to the section 9 the shoulders 11 and12 will he moved toward or away from the ends of the tubular portions 3and 5. After the shoulders 11 and 12 have been engaged with the ends ofthe tubular portions 3 and 5, further rotation of the section 10 willcause the radiator G to shift horizontally between the diametricallyopposed nipples 7 and 8 so that the connection between the nipple 8 andtubular portions .3 and 5 as well as the connection between the nipple 7and portions 4 and 6 will become tight. Any suitable means such as thebolt 13 and lug 14 may be used to retain the parts in adjusted position.Thus a metal-to-metal contact is provided at the joints and gaskets andfurnace cement has been dispensed with entirely. Preferably the section10 contains a pivotally mounted damper 10 for controlling the dischargeof the products of combustion from the coIn bastion chamber G into theradiator G.

The foregoing constructionis particularly Mm and 6 of the combustionchamber is closed by a plug 15 and an inclined partition 16 ispreferably inserted in the radiator G at the outer end of the sectionalnipple 8 so'that the products of combustion will be forced to travelcompletely around the radiator before they can pass out through theoutlet 17 to a suitable flue (notshown), Thus with my construction thefurnace is readily convertible for use as either a coal or. oil burner.

While it is believed that from the foregoing description the nature andadvantages of the invention will be readily apparent, I desire to haveit understood thatl do not limit myself to what is herein shown anddescribed and that such changes may be resorted to when desired asfall'within thescope of what is claimed.

What I claim as my invention is:

1. A furnace having a combustion chamber provided at diametricallyopposite points with laterally projecting tubular portions, a radiatorupon the outer side of said chamber having tubular portions in alignmentwith thetubular portions aforesaid, and connections between saidradiator and chamber including nipples engaging the aligned por tionsaforesaid of the radiator and combustion chamber, one of said nippleshaving relatively adjustable parts adapted when ad-' justed to cause theother nipple tobe held in tight engagement with certain of said alignedtubular portions.

2. A furnace having a combustion chamber provided at diametricallyopposite points with laterally projecting tubular portions, a circularradiator enveloping the chamber and having tubular. portions inalignment with the tubular portions aforesaid, connections between thesaid combustion chamber and radiator including nipples engaging thealigned portions aforesaid, a plug in one of said tubular portions ofthe chamber, and means within the radiator opposite the other tubularportion of the chamber and causing products of combustion received inthe radiator from the chamber to travel longitudinaily of the radiatorbefore being discharged therefrom. i

3. A furnace having a combustion chamber provided at substantiallydiametrically opposite points with openings, a radiator enveloping thechamber and having openings in substantial alignment with the openingsaforesaid, connections between the said combustion chamber and radiatorincluding nipples engaging the aligned openings aforesaid, a closure forone of said nipples, said radiator being also provided in substantialalignment with the other of said nipples with an outlet for the productsof combustion, and

" means within the radiator between the last mentioned nipple and outletcausing products of combustiondischarged'from the said nipple to travellongitudinally of'the radiator from the last mentioned nipple to theoutlet before being discharged therefrom,

4. vA furnace having a combustion chamber provided at "substantiallydiametrically opposite points with openings, a'radiator encircling thecombustion chamber and having openings at substantially diametricallyopposite points thereof in substantial alignment withthe openings inthecombustion chamber, and connections between said radiator and'chamberincluding nipples engaging the ber provided at substantiallydiametrically opposite points thereof with openings, a radiatorencircling the chamber and having openings in substantial alignment withthe openings aforesaid, and connections between said combustion chamberand radiator including nipples extending through the aligned'openingsaforesaid, one of said nipples having a portion bearing against an edgeof one opening in the chamber and having another portion bearing againstan edge of one opening in the radiator, and the other nipple havingrelatively adjustable parts provided with flanges for engagement withportions of the chamber and radiator respectively, the arrangement beingsuch that when one of said parts is adjusted relative to the other theflanges of said parts will be forced tightly against portions of theradiator and chamber and the portions aforesaid of the first mentionednipple will be maintained in tight engagement with the edges aforesaidof the chamber and radiator.

6. A furnace having a combustion chamber provided at substantiallydiametrically opposite poi-n s with substantially aligned circuiarportions, a radiator upon the outer side of the combustion chamber andhaving circular portions in substantial alignment with engagement withthe ali ed circular ortions aforesaid of the rachator and cham r.

7. A furnace having a combustion chamber, a racliator surrounding saiolchamber, and connections hetween said chamber and radiator includingmeans at substantially diametrically opposite points of said chamberancl radiator for conducting products of comlit) hustion from thechamber into the radiator, one of said means including relativelyadjustahle parts provided with means for en'- gagement with the chamberand radiator and aclapteol upon adjustment to shift the radiatorsubstantially horizontally relative to the chamber and cause theconnections between the means, combustion chamber and radiator to hetight.

ln testimony whereof I aflix my signature.

EARNEST L. WATSON.

